How long will the EcoFlow River 3 Plus run a 12v cooler / fridge?

Q: How long will the EcoFlow River 3 Plus run a 12v cooler / fridge?

The EcoFlow River 3 Plus has 286 Wh (about 218 Wh usable at the outlet, estimated). Running a 12v cooler / fridge that draws 45W, it lasts about 4.8 hours on a single full charge.

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Will the EcoFlow River 3 Plus run a 12v cooler / fridge?

Yes — the River 3 Plus runs a 12v cooler / fridge comfortably

Its 600W continuous output easily covers the 45W draw, with 1200W of surge on tap for startup.

Estimated runtime

about 4.8 hours

on a single full charge

Est. usable (AC): 218 Wh

Appliance draw: 45 W

Continuous output: 600 W

How we calculated this

We start from the EcoFlow River 3 Plus's 218 Wh of estimated usable energy at the outlet — its 286 Wh rating, derated for a safe depth of discharge and ~15% inverter loss — then divide by the 12v cooler / fridge's 45W draw:

218 Wh ÷ 45 W ≈ 4.8 hours

Heads up: a 12v cooler / fridge is a motor/compressor load that spikes 2–3× on startup. The EcoFlow River 3 Plus's 600W continuous / 1200W surge output has plenty of headroom for that spike.

Real-world runtime varies with temperature, cable losses, and how hard the appliance actually cycles. Treat this as a solid estimate, not a guarantee.

Check River 3 Plus price → Full River 3 Plus specs →